Safety check for windows



Dec. 31, 1935. A J RA CK 2,025,736

SAFETY CHECK FOR WINDOWS.

Filed April 17, 1935 IN VENTOR.

ATTORNEY.

Patented Dec. 31, 1935 UNE'EE STATES Application April 17, 1935, Serial No. 16,843

2 Claims.

This invention relates to improvements in safety checks for windows, and aims to provide such a device which may be secured upon a vertical member of an upper sash to limit the upward movement of the lower sash or the downward movement of the upper sash.

It is an object of the invention to provide such a safety check having a locking element pivotally mounted thereon so that it may be readily moved into an inoperative position and unlimited movement of either sash obtained.

Another object of the invention is to provide such a safety check which may be secured upon either the right or left hand vertical member of a window sash; and wherein means are provided for preventing accidental movement of the locking element.

A further object of the invention is to provide such a check with an element pivoted about an axis parallel with the line of movement of the sashes, so that the element may be turned about its axis until it rests adjacent the window pane; and when in that position unobstructed movement of the sashes may occur.

With these and other objects and advantages in view which will become apparent as the specification proceeds, the invention is hereinafter more fully described with the aid of the accompanying drawing, in which:

Figure 1 illustrates a partial front elevation of a window equipped with my invention.

Figure 2 is a side view of Figure 1, and

Figure 3 is a front elevation of the invention showing the locking element turned at 90 degrees to the stationary plate.

Referring to the drawing, I designates a portion of a conventional window frame wherein an ordinary upper sash 2 and a lower sash 3 are mounted for vertical movement, and have window panes 4 and 5 respectively therein.

Mounted upon the inner face of one of the vertical members 20. of the upper sash 2 is a stationary plate 5 held by fastening means (not shown) which extends through apertures I in the said plate. Formed integral with the latter upon one of its vertical margins which projects inwardly from the member 2a and over the pane 4 are rearwardly folded hinge portions 8 through which a hinge pin 9 extends. I denotes a locking element having an integral hinge portion H which in this case is shown transversely split for manufacturing reasons. The pin 9 extends through the hinge portion II.

The central portion of the locking element 10 is forwardly inclined from its upper and lower margins to present two oppositely inclined wedge faces 12 from the lateral margins of which re inforcing flanges l3 and M extend so that their edge faces rest upon the plate 5. The hinge portion II is integral with the reinforcing flange I3; and both the'latter and the flange is are horizontally slotted at 15 and ifia respectively centrally of their height. The slot id in the flange I3 is merely a continuation of the split in the hinge portion l I and has no operating significance. The slot lea however is provided for a reasonhereinafter set forth. It may here be remarked that the wedge faces l2 are preferably of greater width at their upper and lower margins which rest upon the plate 6, and narrower at their common outwardly projecting extremity which is generally located centrally of the height of the element It}, as when so formed the wedge faces are stronger to withstand the strain imposed upon them when the lower sash comes suddenly in contact with them.

The reinforcing flanges l3 and M are so formed that their opposite edge faces are a greater distance apart centrally of the height of the element In, and are inclined towards one another'towards their extremities. Formed upon the edge face of the flange M on both sides of the slot l5a are shallow lugs 16 which engage a correspondingly inclined slot l1 formed in the plate 6. Each cooperating pair of lugs I6 and slot portions l'l constitute a lock which holds the element against accidental pivotal movement.

When the lower sash 3 is moved upward to its position 3a it strikes the lower wedge face l2 and further upward movement of the said sash is then prevented. As the lower sash contacts the wedge face upward pressure is exerted upon the element l 0. The strain resulting from this upward movement is taken in part by the upper lug I6 which is forced against the outer margin of the upper 40 portion of the slot H. The slot I5a causes the flange M to be somewhat resilient. This resilience absorbs a considerable portion of the shock that would otherwise be suddenly exerted by the lug [6 upon the margin of the slot I1 and thus the strain which the lug is called upon to withstand is materially lessened. By making the slot I1 and the edge faces of the flanges l3 and I4 V-shaped the length of the bearing of the lugs 16 upon the slot portions is obviously materially increased. From the above it will be seen that the hinge pin 9 is protected by the engaged lugs l6 and the possibility of the pin becoming bent is materially reduced.

It will be clearly seen that when the element .5

I0 is moved pivotally to its position indicated at lfia that it is adjacent the pane 4 and so located that ample clearance is afforded for passage of the lower sash 3 in front of it. It will also be noted that the arrangement of the opposed wedge faces I 2 permits installation of the device upon either side of the window sash.

While in the foregoing the preferred embodiment of the invention has been described and shown it is understood that alterations and modi fications may be made therein provided the said alterations and modifications fall within the scope of the appended claims.

What I claim as my invention and desire to se cure by Letters Patent is:

I. A safety check for windows comprising a plate for attachment to a vertical member of an upper sash of a. window, said plate having a slot formed therein and a rearwardly disposed hinge portion upon one vertical margin, a locking element having a hinge portion cooperating with the first named hinge portion, oppositely inclined wedge faces formed upon the locking element, said faces extending forwardly from their upper and lower extremities which rest upon said plate, reinforcing flanges on both sides of the wedge faces the edge faces of which bear against said plate, and projections upon one edge face to engage the plate slot.

} 2. A safety check for windows comprising a plate for. attachment to a vertical member of an upper sash of a window, a rearwardly disposed hinge member upon said plate extending vertically-along one margin thereof which is adapted to be arranged inwardly of the vertical member and in front of the window pane, said plate having a substantially V-shaped slot formed therein substantially centrally of its height, a locking element having a hinge portion cooperating with the first named hinge portion, oppositely inclined and: vertically aligned wedge faces formed upon and extending from the top and bottom of the locking element, reinforcing flanges extending from the lateral margins of the wedge faces and having their edge faces normally resting upon said plate, thelocking element hinge portion extending from one of the flanges, the edge face of the flange remote from the hinge portion being outwardly inclined from its upper and lower extremities towards the center, said flange being horizontally and centrally split, and shallow lugs projecting from the edge face of; the flange on both sides of said split to-engage the V.-shaped plate slot; the upper projection being adapted. to engagethe upper; outer face of the slot margin when. pressure is exerted; against the lower. wedge face by the upper. extremity of, the lower sash of the window, the split: portion of the reinforcing flange providing'resilience, to cushion the thrust of; the projection against the slot margin.

ARTHUR J; FRAN CK. 

